FFmpeg
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fft_init.c
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1 /*
2  * This file is part of FFmpeg.
3  *
4  * FFmpeg is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * FFmpeg is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with FFmpeg; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 #include "config.h"
20 #include "libavutil/attributes.h"
21 #include "libavutil/cpu.h"
22 #include "libavutil/x86/cpu.h"
23 #include "fft.h"
24 
26 {
27  int cpu_flags = av_get_cpu_flags();
28 
29 #if ARCH_X86_32
30  if (EXTERNAL_AMD3DNOW(cpu_flags)) {
31  /* 3DNow! for K6-2/3 */
35  }
36  if (EXTERNAL_AMD3DNOWEXT(cpu_flags)) {
37  /* 3DNowEx for K7 */
41  }
42 #endif
43  if (EXTERNAL_SSE(cpu_flags)) {
44  /* SSE for P3/P4/K8 */
50  }
51  if (EXTERNAL_AVX(cpu_flags) && s->nbits >= 5) {
52  /* AVX for SB */
56  }
57 }